diff options
Diffstat (limited to 'sound/soc/codecs/adau1761-spi.c')
-rw-r--r-- | sound/soc/codecs/adau1761-spi.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sound/soc/codecs/adau1761-spi.c b/sound/soc/codecs/adau1761-spi.c new file mode 100644 index 000000000000..cce2f11f1ffb --- /dev/null +++ b/sound/soc/codecs/adau1761-spi.c @@ -0,0 +1,77 @@ +/* + * Driver for ADAU1761/ADAU1461/ADAU1761/ADAU1961 codec + * + * Copyright 2014 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> +#include <sound/soc.h> + +#include "adau1761.h" + +static void adau1761_spi_switch_mode(struct device *dev) +{ + struct spi_device *spi = to_spi_device(dev); + + /* + * To get the device into SPI mode CLATCH has to be pulled low three + * times. Do this by issuing three dummy reads. + */ + spi_w8r8(spi, 0x00); + spi_w8r8(spi, 0x00); + spi_w8r8(spi, 0x00); +} + +static int adau1761_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct regmap_config config; + + if (!id) + return -EINVAL; + + config = adau1761_regmap_config; + config.val_bits = 8; + config.reg_bits = 24; + config.read_flag_mask = 0x1; + + return adau1761_probe(&spi->dev, + devm_regmap_init_spi(spi, &config), + id->driver_data, adau1761_spi_switch_mode); +} + +static int adau1761_spi_remove(struct spi_device *spi) +{ + snd_soc_unregister_codec(&spi->dev); + return 0; +} + +static const struct spi_device_id adau1761_spi_id[] = { + { "adau1361", ADAU1361 }, + { "adau1461", ADAU1761 }, + { "adau1761", ADAU1761 }, + { "adau1961", ADAU1361 }, + { } +}; +MODULE_DEVICE_TABLE(spi, adau1761_spi_id); + +static struct spi_driver adau1761_spi_driver = { + .driver = { + .name = "adau1761", + .owner = THIS_MODULE, + }, + .probe = adau1761_spi_probe, + .remove = adau1761_spi_remove, + .id_table = adau1761_spi_id, +}; +module_spi_driver(adau1761_spi_driver); + +MODULE_DESCRIPTION("ASoC ADAU1361/ADAU1461/ADAU1761/ADAU1961 CODEC SPI driver"); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_LICENSE("GPL"); |